I just want to make sure I have this correct - I choose my exclusive pitcher and make my team based on players who played on the same team as him during those years. Or can I use any season for one of his teammates as long as the SP was playing?

For example, I'd like to use Mike Mussina - Orioles (1991-2000) and Yankees (2001-2008). Bernie Williams played with him on the NYY from 01-06, but he was also playing from 91-00. Am I restricted to his 01-06 season because him and Mussina were teammates then, or can I use his other seasons as well?